Lining for an aluminum electrolyzer having inert anodes

Abstract

The invention provides a lining for an aluminium electrolyzer having inert anodes and is enclosed in a cathode casing comprising a bottom formed from taller blocks having projections and shorter bottom blocks. The shorter bottom blocks are mounted at the ends of the bottom of the cathode device. The shorter bottom blocks alternate with the taller bottom blocks having projections. Vertical channels are provided in the projections of the blocks over the entire thickness of the block for the mounting of conductive elements formed from aluminium and are attached in the lower part to a current-carrying collector that is in the form of a plate which extends out of the ends of the bottom blocks and through the longitudinal sides of the cathode casing.

The invention claimed is: 
     
       1. Lining of an aluminum electrolyzer with inert anodes, enclosed in a cathode casing, including a bottom made from refractory noncarbon material, and conductive elements of aluminum, which are liquid in the upper part in contact with the aluminum melt and solid in the lower part, and installed passing vertically through the bottom,
 characterized in that the bottom is made of taller bottom blocks having projections and shorter bottom blocks, the shorter bottom blocks being mounted at the end faces of the bottom, 
 wherein the shorter bottom blocks alternate with the taller bottom blocks having projections, and vertical channels are provided only in the projections of the blocks over the entire thickness of the block for the mounting of the conductive elements, 
 while the conductive elements are fastened in the lower part to a current-carrying collector in the form of a plate which extends horizontally out from the end faces of the bottom blocks and through the longitudinal sides of the cathode casing. 
 
     
     
       2. Lining of an aluminum electrolyzer according to  claim 1 , characterized in that the conductive elements are L-shaped or T-shaped. 
     
     
       3. Lining of an aluminum electrolyzer according to  claim 1 , characterized in that the bottom blocks are made of high-alumina concrete which is roasted up to 1200° C. or they are made of several layers, a working layer made of high-alumina concrete with thickness of 0.4 to 0.6 of the thickness of the block, and a secondary layer made of alumosilicate concrete, for the rest. 
     
     
       4. Lining of an aluminum electrolyzer according to  claim 1 , characterized in that the connection between the bottom blocks is made of high-alumina concrete with reduced viscosity or by means of an adhesive or cementing composition with a seam thickness of 5-20 mm.